“Wheel of Fortune” host Pat Sajak is that rare Hollywood conservative, and he’s been a shrewd observer of the political scene for some time.

But even Sajak was taken aback at President Barack Obama’s recent speech in which he now-famously told a crowd that entrepreneurs shouldn’t take sole credit for their handiwork – the “you didn’t build that” decree that launched a thousand mocking Tweets.

It’s as if President Obama climbed into a tank, put on his helmet, talked about how his foray into Cambodia was seared in his memory, looked at his watch, misspelled “potato” and pardoned Richard Nixon all in the same day….

These defining moments take hold most devastatingly when they confirm what a large portion of the electorate already believes. Taken alone, it seems unfair that a single moment, an unguarded remark or a slip of the tongue can carry such weight. They’re often dismissed as “gotcha” moments, but when voters are able to nod and say, “I knew it,” these moments stick and do terrible damage. We have witnessed such a moment.